Finally, quit Disk Utility and select "Reinstall macOS" or "Install macOS" (or Mac OS X, for older versions) from the macOS Utilities window. Follow the rest of the prompts to finish the installation.

macOS High Sierra 10.13.5 brings Messages in iCloud and security updates The pre-WWDC update mainly adds a feature promised way back at last year's WWDC.

Valve’s Steam gaming store will drop support for macOS High Sierra and macOS Mojave early next year, effectively ending support for the last versions of macOS that could run 32-bit games, notes ...

It was in the following release, macOS High Sierra, that Apple made the switch to only 64-bit apps. This meant that older 32-bit software could no longer be used from this 2018 update or later.

According to the Steam Support blog, on February 15, Steam will stop supporting macOS 10.13 (High Sierra) and 10.14 (Mojave), which were released in 2017 and 2018 respectively.

On Feb. 15, 2024, Valve will end support for macOS 10.13 (High Sierra) and 10.14 (Mojave). As Mojave was the last to support 32-bit applications, Steam won't support 32-bit games on Mac anymore.

The update will effectively end support for macOS 10.12 Sierra, 10.13 High Sierra, and 10.14 Mojave. Similarly, Windows 7 and 8 users will no longer receive any more security updates.

Mozilla Firefox 's newest update came out Tuesday, and it'll be the last version some Mac users may receive. MacOS Sierra, High Sierra and Mojave will no longer be supported by the browser ...